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Larger organisms commonly have seasonal migration patterns that allow them to utilize favourable seasonal resource and environmental conditions over large spatial areas. Such movements can be represented in Ecospace in two ways. First is a simple “Lagrangian” approach that does not require explicit simulation of movement; the idea here is to simply think of the whole Ecospace map as moving in space so as to remain centred on the distribution of some dominant migratory specie(s). Second is a more complex “Eulerian” approach, which does involve explicitly modelling changes in instantaneous rates of biomass flow among the Ecospace spatial cells, in some way that approximates at least the changing centre of distribution of the migratory species.

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Larger organisms commonly have seasonal migration patterns that allow them to utilize favourable seasonal resource and environmental conditions over large spatial areas. Such movements can be represented in Ecospace in two ways. First is a simple "Lagrangian" approach that does not require explicit simulation of movement; the idea here is to simply think of the whole Ecospace map as moving in space so as to remain centred on the distribution of some dominant migratory specie(s). Second is a more complex "Eulerian" approach, which does involve explicitly modelling changes in instantaneous rates of biomass flow among the Ecospace spatial cells, in some way that approximates at least the changing centre of distribution of the migratory species.

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The Eulerian approach is implemented in Ecospace by allowing users to define a monthly sequence of “preferred” map cell positions and to define how spread out the migrating fish are likely to be around these preferred cells by setting north-south and east-west “concentration parameters”.

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The Eulerian approach is implemented in Ecospace by allowing users to define a monthly sequence of "preferred" map cell positions and to define how spread out the migrating fish are likely to be around these preferred cells by setting north-south and east-west "concentration parameters".

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For more detail see [wiki:EwEugRepresentingSeasonalMigrationInEcospace Representing seasonal migration in Ecospace].